{
  "manageEntity": {
    "action": "Save",
    "entityId": "2063447498",
    "entityType": "Track",
    "nonce": "0xc0ee9326d8a3636f80bc023dbdf0499cc89b56f4646e49aa45168858e97936c5",
    "signature": "0xff8dbbbdddd725c995845bd6ae0fc1e5829de7c861ba2cec60056081da78d9431df8f1e13f78e6b34ee39e63a93307fd53d20d0a570d1bebe938c0e161a3c7ed1c",
    "signer": "0xA66d5981794A5e084FBD9adBFF28F465924fb9a9",
    "userId": "980224167"
  }
}